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Editor's Tip

Keep hair healthy from start to finish with Number 4 Birchbox Exclusive Hair Revival Kit.

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Number 4 Hair Care

4.7 out of 5 stars, based on 25 reviews 25 Reviews / Write a Review
$58.00
Size: 5.1 oz   

Availability: In stock

$58.00

Birchbox Breakdown

Situation: Your hair is dry and brittle and you’re a few weeks (perhaps a few paychecks) away from a trim. Solution: A super-hydrating leave-in treatment. We’re partial to Number 4’s™ Lumiere d’hiver Reconstructing Masque because it infuses moisture and protein (the two things that hair needs most!) into strands, leaving our hair soft, shiny, and in far better shape than it was before.

How it Works

Soy protein works to reconstruct and strengthen hair while natural conditioners like shea butter, jojoba seed oil, and sunflower oil nourish and moisturize. Don’t forget about the silkiness factor — for that, there’s silicone polymer, which smoothes and detangles.

How to Use

After shampooing, wring excess moisture from hair. Apply evenly to hair starting at the ends and working your way upward to your scalp. Wait for two to five minutes, then rinse thoroughly.

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Product Reviews & Sample Feedback

4.7 out of 5 stars, based on 25 reviews 25 Reviews
4.7 out of 5 stars
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5 Star
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4 Star
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3 Star
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5 out of 5 stars
very moisterizing

I love using this on my hair when I deep condition. It has a faint smell of cocoa and makes my hair very soft.

5 out of 5 stars
Amazing

This stuff is awesome! Feels so rich and thick but doesn't weigh my hair down. My hair is very fine and it's easy for things to be too heavy but this is just nourishing. Feels like I have new hair afterwards!

5 out of 5 stars
Great Product

I just tried this masque and my hair feels extra soft and silky. I can't see what it does after I have used it for a month!

4 out of 5 stars
Smells awesome ♡

I loved using my sample of this masque. It smelled amazing and had a good thick texture. Made my hair feel nice, but I did not notice any dramatic results.

4 out of 5 stars
smooth hair

I bought this product and for its price its a good size. You only need a small amount to get the results. I have medium length hair and when I use conditioners they leave my hair limp and weight down. This masque leaves my hair bouncy, shiny and very soft...

I don't really like the smell and that is why it does not get the full 5 stars.

5 out of 5 stars
Love Love Love!

I've always sworn by Number 4 Lumiere. It makes my hair SO soft and it smells great! It left my hair feeling so much more healthier and shinier!

3 out of 5 stars
Not what it's cracked up to be...

I'd give this 2.5 stars if it would let me. I purchased this after having used the clarifying shampoo and reading all the great reviews. I tried it the same day it came in the mail. It wasn't as thick as people made it out to be and a little bit goes a long way. It smelled pretty good and made my hair feel really soft after having rinsed it out. I let my hair air dry and my frizzy curly mess was still there. I did notice that my hair was softer, but I was expecting a miracle based off of people's reviews. My hair was not any less frizzy than it is when I use other products. For the price I was definitely expecting better results. I am going to try and leave it in longer next time and see if that makes a difference.

5 out of 5 stars
Replaces my Keratin Treatment!

I read the reviews and decided to splurge on this treatment after loving my sample of the shampoo. WOW! I feel like I have a new head of hair. I have very full, thick and wavy hair. I had been getting a few salon keratin treatments per year to keep it shiny and straight...no more. This treatment did the same thing for me without all the chemicals and $500 price tag. In that light, this is a steal!

5 out of 5 stars
Great product!

This reconstructing masque is amazing. I left it on for longer than the time given, probably about an hour, but I could definitely feel the difference after just one use. Even today after washing my hair and NOT using this my hair was less frizzy, looks healthier, and isn't as tangled as normal.
I LOVE THIS STUFF.
I will definitely be buying this again whenever I run out of my first bottle.

5 out of 5 stars
Best product I have ever bought for my hair

I have curly, frizzy, highlighted hair, which I constantly flat iron and blow dry. I used to get the keratin treatment at the salon done and loved how it took less time to blow dry my hair and there was less of a "lion's mane" so to speak. I stopped getting those because of the cost and was desperately searching for something else... Whelp, this is it! this product is awesome. I am obsessed! I can't see an end to me buying this.